Technical Questions on Photography and Optics

Subject	Started by	Replies	Views	Last post
Mining T-Stop Data from DxO	KeithB	1	4726	October 27, 2010, 10:45:17 AM by Bob Atkins
flashing lights when viewing my pics on my canon 40d	gap5758	1	5510	September 12, 2010, 05:48:08 PM by KeithB
Old Spiratone 18mm lens to Canon 7D (HELP)	x30mileswest	1	8101	August 03, 2010, 08:22:50 PM by Bob Atkins
HELP! Canon EOS 7D Problem	nyodreamz9	5	9364	July 18, 2010, 06:01:20 PM by Bob Atkins
Minolta MD lens used on Canon EOS 7D... one problem,	rich	1	7614	July 14, 2010, 11:52:26 PM by Bob Atkins
DOF: comparing TS-E lenses for Product Photography (1" - 10" sized jewelry)	mr.peacock	2	6046	July 13, 2010, 09:22:07 AM by mr.peacock
Question about the new DXO site and lens measurement methods	Johnny	2	5204	June 28, 2010, 08:56:58 AM by Johnny
Constant Aperture Zooms	KeithB	3	5661	June 24, 2010, 11:47:28 AM by Bob Atkins
Lens testing	KeithB	2	5619	June 16, 2010, 11:54:12 AM by Bob Atkins
Focusing long lens camera	beardown911	3	5935	June 11, 2010, 12:02:07 PM by beardown911
Canon PowerShot A720 IS	j cowan	1	6683	May 16, 2010, 11:11:01 AM by Bob Atkins
White Balance Menu Settings	bmpress	3	6017	May 12, 2010, 10:35:41 AM by bmpress
EF-S 17-85mm IS USM and the Err99 of Doom	ESP2008	6	9106	April 14, 2010, 11:32:33 PM by ESP2008
reflective cameras?	emanresu	4	6318	April 07, 2010, 10:17:13 AM by klindup
does crop factor affect the actual f-stop?	emanresu	8	21073	April 07, 2010, 09:32:50 AM by KeithB
question on IS motor	emanresu	4	6281	April 06, 2010, 01:03:28 PM by emanresu
checkerboard chart	avi	2	7222	March 15, 2010, 11:41:13 AM by avi
Las Vegas Nights and Grand Canyon - Best Lens under $400 for site	blazer	3	10133	March 08, 2010, 07:36:50 AM by ClaireJeffries
Canon 40D picture quality issue!	Tallyther	1	5142	March 07, 2010, 07:21:51 PM by Bob Atkins
newbie lens question	126andy	2	4891	March 07, 2010, 02:08:51 PM by 126andy